./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c18b98479d83d3111a28d9798b2d068fc51f15fb ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 03:02:37,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:02:37,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:02:37,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:02:37,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:02:37,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:02:37,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:02:37,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:02:37,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:02:37,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:02:37,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:02:37,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:02:37,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:02:37,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:02:37,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:02:37,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:02:37,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:02:37,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:02:37,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:02:37,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:02:37,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:02:37,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:02:37,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:02:37,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:02:37,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:02:37,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:02:37,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:02:37,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:02:37,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:02:37,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:02:37,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:02:37,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:02:37,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:02:37,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:02:37,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:02:37,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:02:37,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:02:37,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:02:37,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:02:37,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:02:37,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:02:37,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 03:02:37,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:02:37,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:02:37,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:02:37,934 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:02:37,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:02:37,935 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:02:37,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 03:02:37,935 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:02:37,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:02:37,935 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 03:02:37,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 03:02:37,937 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:02:37,938 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 03:02:37,938 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 03:02:37,938 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 03:02:37,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:02:37,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:02:37,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 03:02:37,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:02:37,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:02:37,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 03:02:37,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:02:37,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 03:02:37,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:02:37,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:02:37,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 03:02:37,954 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:02:37,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 03:02:37,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:02:37,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:02:37,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:02:37,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:02:37,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:02:37,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:02:37,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 03:02:37,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 03:02:37,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 03:02:37,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 03:02:37,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:02:37,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:02:37,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c18b98479d83d3111a28d9798b2d068fc51f15fb [2020-11-30 03:02:38,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:02:38,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:02:38,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:02:38,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:02:38,324 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:02:38,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci03.c [2020-11-30 03:02:38,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/data/ea3d1b23a/0ee0235640c445219b99cae3fac6fab8/FLAG13a2caa0a [2020-11-30 03:02:38,906 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:02:38,907 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/sv-benchmarks/c/recursive/Fibonacci03.c [2020-11-30 03:02:38,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/data/ea3d1b23a/0ee0235640c445219b99cae3fac6fab8/FLAG13a2caa0a [2020-11-30 03:02:39,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/data/ea3d1b23a/0ee0235640c445219b99cae3fac6fab8 [2020-11-30 03:02:39,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:02:39,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:02:39,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:02:39,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:02:39,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:02:39,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2699b8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39, skipping insertion in model container [2020-11-30 03:02:39,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:02:39,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:02:39,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:02:39,670 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:02:39,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:02:39,718 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:02:39,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39 WrapperNode [2020-11-30 03:02:39,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:02:39,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:02:39,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:02:39,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:02:39,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:02:39,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:02:39,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:02:39,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:02:39,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... [2020-11-30 03:02:39,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:02:39,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:02:39,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:02:39,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:02:39,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:02:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-11-30 03:02:39,908 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-11-30 03:02:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:02:39,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:02:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 03:02:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:02:40,235 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:02:40,236 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 03:02:40,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:02:40 BoogieIcfgContainer [2020-11-30 03:02:40,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:02:40,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:02:40,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:02:40,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:02:40,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:02:39" (1/3) ... [2020-11-30 03:02:40,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233fe4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:02:40, skipping insertion in model container [2020-11-30 03:02:40,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:02:39" (2/3) ... [2020-11-30 03:02:40,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233fe4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:02:40, skipping insertion in model container [2020-11-30 03:02:40,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:02:40" (3/3) ... [2020-11-30 03:02:40,250 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-11-30 03:02:40,263 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:02:40,268 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 03:02:40,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 03:02:40,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:02:40,333 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 03:02:40,333 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:02:40,334 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:02:40,334 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:02:40,334 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:02:40,334 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:02:40,334 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:02:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-30 03:02:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 03:02:40,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:40,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:40,395 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1875978907, now seen corresponding path program 1 times [2020-11-30 03:02:40,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:40,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991550608] [2020-11-30 03:02:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:02:40,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991550608] [2020-11-30 03:02:40,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:02:40,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 03:02:40,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322603610] [2020-11-30 03:02:40,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:02:40,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:40,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:02:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:02:40,730 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-11-30 03:02:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:02:40,969 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-11-30 03:02:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 03:02:40,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 03:02:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:02:40,986 INFO L225 Difference]: With dead ends: 28 [2020-11-30 03:02:40,986 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 03:02:40,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 03:02:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 03:02:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 03:02:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 03:02:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-30 03:02:41,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-11-30 03:02:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:02:41,056 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-30 03:02:41,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:02:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-30 03:02:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 03:02:41,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:41,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:41,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 03:02:41,059 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1284688169, now seen corresponding path program 1 times [2020-11-30 03:02:41,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:41,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635035378] [2020-11-30 03:02:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:02:41,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635035378] [2020-11-30 03:02:41,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:02:41,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 03:02:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849013459] [2020-11-30 03:02:41,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:02:41,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:41,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:02:41,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:02:41,194 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-11-30 03:02:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:02:41,298 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-30 03:02:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 03:02:41,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 03:02:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:02:41,301 INFO L225 Difference]: With dead ends: 24 [2020-11-30 03:02:41,301 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 03:02:41,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 03:02:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 03:02:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-30 03:02:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 03:02:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-30 03:02:41,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-11-30 03:02:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:02:41,311 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-30 03:02:41,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:02:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-30 03:02:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 03:02:41,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:41,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:41,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 03:02:41,313 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash -920756058, now seen corresponding path program 1 times [2020-11-30 03:02:41,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:41,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750876444] [2020-11-30 03:02:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 03:02:41,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750876444] [2020-11-30 03:02:41,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022073102] [2020-11-30 03:02:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 03:02:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:02:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 03:02:41,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:02:41,890 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 03:02:41,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 03:02:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 03:02:41,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217978388] [2020-11-30 03:02:42,019 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:02:42,019 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:02:42,025 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:02:42,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:02:42,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2020-11-30 03:02:42,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887175277] [2020-11-30 03:02:42,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 03:02:42,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:42,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 03:02:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-30 03:02:42,031 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 12 states. [2020-11-30 03:02:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:02:42,308 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-11-30 03:02:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 03:02:42,309 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-11-30 03:02:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:02:42,311 INFO L225 Difference]: With dead ends: 42 [2020-11-30 03:02:42,311 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 03:02:42,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-11-30 03:02:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 03:02:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 03:02:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 03:02:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-11-30 03:02:42,334 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2020-11-30 03:02:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:02:42,335 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-11-30 03:02:42,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 03:02:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-11-30 03:02:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-30 03:02:42,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:42,343 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:42,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 03:02:42,564 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 383861068, now seen corresponding path program 1 times [2020-11-30 03:02:42,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:42,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830506021] [2020-11-30 03:02:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-30 03:02:42,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830506021] [2020-11-30 03:02:42,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636569113] [2020-11-30 03:02:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 03:02:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:02:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-30 03:02:42,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:02:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 03:02:43,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1450875434] [2020-11-30 03:02:43,510 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:02:43,511 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:02:43,511 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:02:43,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:02:43,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2020-11-30 03:02:43,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423393414] [2020-11-30 03:02:43,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 03:02:43,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 03:02:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-30 03:02:43,520 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 12 states. [2020-11-30 03:02:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:02:43,846 INFO L93 Difference]: Finished difference Result 44 states and 74 transitions. [2020-11-30 03:02:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 03:02:43,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-11-30 03:02:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:02:43,851 INFO L225 Difference]: With dead ends: 44 [2020-11-30 03:02:43,851 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 03:02:43,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-11-30 03:02:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 03:02:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-11-30 03:02:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 03:02:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 60 transitions. [2020-11-30 03:02:43,885 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 60 transitions. Word has length 51 [2020-11-30 03:02:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:02:43,886 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 60 transitions. [2020-11-30 03:02:43,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 03:02:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 60 transitions. [2020-11-30 03:02:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-30 03:02:43,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:43,909 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 11, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:44,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:44,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1867378188, now seen corresponding path program 2 times [2020-11-30 03:02:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:44,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672356228] [2020-11-30 03:02:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-11-30 03:02:44,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672356228] [2020-11-30 03:02:44,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122571545] [2020-11-30 03:02:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:44,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-30 03:02:44,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 03:02:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 03:02:44,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:02:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 383 proven. 12 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2020-11-30 03:02:44,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:02:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 383 proven. 14 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2020-11-30 03:02:45,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033387538] [2020-11-30 03:02:45,784 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:02:45,784 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:02:45,785 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:02:45,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:02:45,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2020-11-30 03:02:45,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908187003] [2020-11-30 03:02:45,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 03:02:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 03:02:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-30 03:02:45,789 INFO L87 Difference]: Start difference. First operand 35 states and 60 transitions. Second operand 17 states. [2020-11-30 03:02:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:02:46,624 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2020-11-30 03:02:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 03:02:46,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 157 [2020-11-30 03:02:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:02:46,628 INFO L225 Difference]: With dead ends: 87 [2020-11-30 03:02:46,628 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 03:02:46,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 03:02:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 03:02:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-30 03:02:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-30 03:02:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-11-30 03:02:46,656 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 157 [2020-11-30 03:02:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:02:46,657 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-11-30 03:02:46,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 03:02:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-11-30 03:02:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-30 03:02:46,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:46,661 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:46,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:46,888 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2001063143, now seen corresponding path program 3 times [2020-11-30 03:02:46,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:46,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764919974] [2020-11-30 03:02:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-11-30 03:02:47,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764919974] [2020-11-30 03:02:47,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828950710] [2020-11-30 03:02:47,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:47,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 03:02:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 03:02:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 03:02:47,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:02:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-11-30 03:02:47,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:02:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-11-30 03:02:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693200229] [2020-11-30 03:02:49,614 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:02:49,615 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:02:49,615 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:02:49,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:02:49,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2020-11-30 03:02:49,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033044328] [2020-11-30 03:02:49,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 03:02:49,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:49,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 03:02:49,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-11-30 03:02:49,620 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 18 states. [2020-11-30 03:02:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:02:50,093 INFO L93 Difference]: Finished difference Result 71 states and 109 transitions. [2020-11-30 03:02:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 03:02:50,094 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 174 [2020-11-30 03:02:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:02:50,098 INFO L225 Difference]: With dead ends: 71 [2020-11-30 03:02:50,098 INFO L226 Difference]: Without dead ends: 65 [2020-11-30 03:02:50,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 336 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-11-30 03:02:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-30 03:02:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-30 03:02:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 03:02:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 102 transitions. [2020-11-30 03:02:50,140 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 102 transitions. Word has length 174 [2020-11-30 03:02:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:02:50,142 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 102 transitions. [2020-11-30 03:02:50,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 03:02:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 102 transitions. [2020-11-30 03:02:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-11-30 03:02:50,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:02:50,178 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 97, 59, 59, 59, 59, 59, 59, 59, 38, 22, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:02:50,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:50,392 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:02:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:02:50,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2081306324, now seen corresponding path program 4 times [2020-11-30 03:02:50,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:02:50,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046068529] [2020-11-30 03:02:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:02:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 39584 backedges. 554 proven. 4397 refuted. 0 times theorem prover too weak. 34633 trivial. 0 not checked. [2020-11-30 03:02:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046068529] [2020-11-30 03:02:51,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234174410] [2020-11-30 03:02:51,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:02:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:02:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 03:02:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:02:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39584 backedges. 554 proven. 4397 refuted. 0 times theorem prover too weak. 34633 trivial. 0 not checked. [2020-11-30 03:02:52,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:02:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 39584 backedges. 554 proven. 4474 refuted. 0 times theorem prover too weak. 34556 trivial. 0 not checked. [2020-11-30 03:02:59,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949667828] [2020-11-30 03:02:59,544 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:02:59,545 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:02:59,545 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:02:59,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:02:59,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 20 [2020-11-30 03:02:59,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168094828] [2020-11-30 03:02:59,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 03:02:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:02:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 03:02:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-11-30 03:02:59,552 INFO L87 Difference]: Start difference. First operand 65 states and 102 transitions. Second operand 20 states. [2020-11-30 03:03:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:03:00,164 INFO L93 Difference]: Finished difference Result 77 states and 130 transitions. [2020-11-30 03:03:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 03:03:00,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 815 [2020-11-30 03:03:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:03:00,174 INFO L225 Difference]: With dead ends: 77 [2020-11-30 03:03:00,174 INFO L226 Difference]: Without dead ends: 73 [2020-11-30 03:03:00,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1655 GetRequests, 1615 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-11-30 03:03:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-30 03:03:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-11-30 03:03:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 03:03:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 119 transitions. [2020-11-30 03:03:00,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 119 transitions. Word has length 815 [2020-11-30 03:03:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:03:00,223 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 119 transitions. [2020-11-30 03:03:00,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 03:03:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 119 transitions. [2020-11-30 03:03:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2020-11-30 03:03:00,290 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:03:00,291 INFO L422 BasicCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:03:00,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 03:03:00,516 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:03:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:03:00,517 INFO L82 PathProgramCache]: Analyzing trace with hash 8826134, now seen corresponding path program 5 times [2020-11-30 03:03:00,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:03:00,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463333985] [2020-11-30 03:03:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:03:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:03:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 2124 proven. 8643 refuted. 0 times theorem prover too weak. 56427 trivial. 0 not checked. [2020-11-30 03:03:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463333985] [2020-11-30 03:03:02,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832790239] [2020-11-30 03:03:02,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:03:02,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2020-11-30 03:03:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 03:03:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 03:03:02,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:03:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 6285 proven. 293 refuted. 0 times theorem prover too weak. 60616 trivial. 0 not checked. [2020-11-30 03:03:03,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:03:05,546 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-11-30 03:03:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 6285 proven. 314 refuted. 0 times theorem prover too weak. 60595 trivial. 0 not checked. [2020-11-30 03:03:11,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767810184] [2020-11-30 03:03:11,052 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:03:11,052 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:03:11,053 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:03:11,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:03:11,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 17] total 29 [2020-11-30 03:03:11,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766658600] [2020-11-30 03:03:11,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-30 03:03:11,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:03:11,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-30 03:03:11,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2020-11-30 03:03:11,060 INFO L87 Difference]: Start difference. First operand 70 states and 119 transitions. Second operand 29 states. [2020-11-30 03:03:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:03:12,758 INFO L93 Difference]: Finished difference Result 189 states and 418 transitions. [2020-11-30 03:03:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-30 03:03:12,759 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1059 [2020-11-30 03:03:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:03:12,762 INFO L225 Difference]: With dead ends: 189 [2020-11-30 03:03:12,762 INFO L226 Difference]: Without dead ends: 124 [2020-11-30 03:03:12,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2176 GetRequests, 2105 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=815, Invalid=2845, Unknown=0, NotChecked=0, Total=3660 [2020-11-30 03:03:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-30 03:03:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-11-30 03:03:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-30 03:03:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2020-11-30 03:03:12,800 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 156 transitions. Word has length 1059 [2020-11-30 03:03:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:03:12,802 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 156 transitions. [2020-11-30 03:03:12,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-30 03:03:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 156 transitions. [2020-11-30 03:03:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2020-11-30 03:03:12,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:03:12,811 INFO L422 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:03:13,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:03:13,020 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:03:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:03:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -38853932, now seen corresponding path program 6 times [2020-11-30 03:03:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:03:13,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758007504] [2020-11-30 03:03:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:03:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:03:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3238 proven. 6950 refuted. 0 times theorem prover too weak. 40722 trivial. 0 not checked. [2020-11-30 03:03:14,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758007504] [2020-11-30 03:03:14,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101488142] [2020-11-30 03:03:14,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:03:14,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 03:03:14,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 03:03:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 03:03:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:03:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3785 proven. 7472 refuted. 0 times theorem prover too weak. 39653 trivial. 0 not checked. [2020-11-30 03:03:15,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:03:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3785 proven. 7619 refuted. 0 times theorem prover too weak. 39506 trivial. 0 not checked. [2020-11-30 03:03:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011080186] [2020-11-30 03:03:26,233 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:03:26,233 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:03:26,234 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:03:26,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:03:26,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 35] total 39 [2020-11-30 03:03:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904410767] [2020-11-30 03:03:26,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-30 03:03:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:03:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-30 03:03:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2020-11-30 03:03:26,244 INFO L87 Difference]: Start difference. First operand 113 states and 156 transitions. Second operand 39 states. [2020-11-30 03:03:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:03:28,832 INFO L93 Difference]: Finished difference Result 261 states and 475 transitions. [2020-11-30 03:03:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-30 03:03:28,833 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 923 [2020-11-30 03:03:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:03:28,842 INFO L225 Difference]: With dead ends: 261 [2020-11-30 03:03:28,842 INFO L226 Difference]: Without dead ends: 153 [2020-11-30 03:03:28,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1912 GetRequests, 1811 SyntacticMatches, 28 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1325, Invalid=4225, Unknown=0, NotChecked=0, Total=5550 [2020-11-30 03:03:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-30 03:03:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2020-11-30 03:03:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-30 03:03:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 182 transitions. [2020-11-30 03:03:28,871 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 182 transitions. Word has length 923 [2020-11-30 03:03:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:03:28,873 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 182 transitions. [2020-11-30 03:03:28,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-30 03:03:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 182 transitions. [2020-11-30 03:03:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2020-11-30 03:03:28,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:03:28,882 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:03:29,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:03:29,100 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:03:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:03:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1397484327, now seen corresponding path program 7 times [2020-11-30 03:03:29,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:03:29,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992048664] [2020-11-30 03:03:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:03:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:03:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 2756 proven. 10117 refuted. 0 times theorem prover too weak. 20223 trivial. 0 not checked. [2020-11-30 03:03:30,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992048664] [2020-11-30 03:03:30,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121516919] [2020-11-30 03:03:30,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:03:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:03:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 220 conjunts are in the unsatisfiable core [2020-11-30 03:03:31,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:03:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-11-30 03:03:32,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:03:33,888 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:03:34,055 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:03:34,298 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:03:34,492 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:03:35,812 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:03:36,251 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:03:36,682 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:03:37,152 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:03:38,929 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:03:39,136 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:03:39,358 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:03:39,572 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:03:40,772 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 302 [2020-11-30 03:03:41,928 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 302 [2020-11-30 03:03:43,088 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 304 [2020-11-30 03:03:44,272 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 304 [2020-11-30 03:03:45,905 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:03:46,161 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:03:46,379 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:03:46,592 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:03:47,444 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:03:48,261 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:03:48,749 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:03:49,242 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:03:49,828 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:03:52,791 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 491 [2020-11-30 03:03:55,323 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 491 [2020-11-30 03:03:58,353 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification that was a NOOP. DAG size: 493 [2020-11-30 03:04:01,433 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 493 [2020-11-30 03:04:02,766 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:02,876 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:02,994 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:03,113 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:03,880 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:04,113 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:04,358 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:04,599 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:05,446 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:05,570 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:05,696 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:05,816 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:06,361 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:04:06,886 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:04:07,428 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:04:07,963 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:04:08,919 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:09,024 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:09,139 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:09,251 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:11,670 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:11,778 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:11,897 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:12,014 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:12,834 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:13,074 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:13,318 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:13,565 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:15,698 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:17,973 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:18,095 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:18,224 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:18,347 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:19,201 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:19,456 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:19,722 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:19,980 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:20,952 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:21,076 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:21,203 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:21,327 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:21,885 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:04:22,454 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:04:23,334 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:04:23,990 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:04:25,057 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:25,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:25,315 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:25,447 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:26,321 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:26,574 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:26,840 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:27,103 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:28,386 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 302 [2020-11-30 03:04:29,677 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 302 [2020-11-30 03:04:31,038 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 304 [2020-11-30 03:04:32,375 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 304 [2020-11-30 03:04:33,809 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:33,934 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:34,067 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:34,198 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:35,068 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:35,320 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:35,582 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:35,844 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:38,251 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:38,415 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:38,552 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:38,686 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:41,862 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:41,990 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:42,127 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:42,271 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:43,226 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:43,498 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:43,779 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:44,056 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:45,170 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:45,301 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:45,440 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:45,576 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:46,159 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:04:46,737 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-11-30 03:04:47,332 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:04:47,965 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-11-30 03:04:49,053 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:49,176 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:49,307 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:49,449 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:52,333 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:52,465 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:52,609 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:52,749 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:53,736 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:54,013 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-30 03:04:54,300 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:54,588 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-11-30 03:04:57,249 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:57,383 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-30 03:04:57,524 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:04:57,663 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-30 03:05:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-11-30 03:05:00,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186549674] [2020-11-30 03:05:00,076 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 03:05:00,077 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:05:00,077 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 03:05:00,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 03:05:00,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 41 [2020-11-30 03:05:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421160890] [2020-11-30 03:05:00,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-30 03:05:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:05:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-30 03:05:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 03:05:00,084 INFO L87 Difference]: Start difference. First operand 126 states and 182 transitions. Second operand 41 states. [2020-11-30 03:05:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:05:00,795 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2020-11-30 03:05:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-30 03:05:00,798 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 746 [2020-11-30 03:05:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:05:00,800 INFO L225 Difference]: With dead ends: 127 [2020-11-30 03:05:00,800 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 03:05:00,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1714 GetRequests, 1672 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 03:05:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 03:05:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 03:05:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 03:05:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 03:05:00,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 746 [2020-11-30 03:05:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:05:00,804 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 03:05:00,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-30 03:05:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 03:05:00,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 03:05:01,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 03:05:01,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 03:05:02,422 WARN L193 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 52 [2020-11-30 03:05:02,682 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 8 [2020-11-30 03:05:02,716 INFO L274 CegarLoopResult]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2020-11-30 03:05:02,716 INFO L277 CegarLoopResult]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2020-11-30 03:05:02,716 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-11-30 03:05:02,716 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-30 03:05:02,717 INFO L270 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= 5 |fibonacci_#in~n|)) (.cse6 (<= 4 |fibonacci_#in~n|)) (.cse11 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse8 (<= |fibonacci_#in~n| 4)) (.cse10 (<= fibonacci_~n |fibonacci_#in~n|))) (let ((.cse7 (and .cse6 .cse11 (<= 2 |fibonacci_#t~ret7|) .cse8 .cse10)) (.cse1 (and .cse11 (<= 8 |fibonacci_#in~n|) (<= 21 |fibonacci_#t~ret7|) .cse10)) (.cse2 (and (<= 8 |fibonacci_#t~ret7|) (<= 7 fibonacci_~n) (<= |fibonacci_#in~n| 7) .cse10)) (.cse3 (and .cse0 .cse11 (<= 3 |fibonacci_#t~ret7|) (<= |fibonacci_#in~n| 5) .cse10)) (.cse4 (and .cse11 (<= 5 |fibonacci_#t~ret7|) (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) .cse10)) (.cse5 (and (<= 13 |fibonacci_#t~ret7|) .cse11 (<= |fibonacci_#in~n| 8) (<= 7 |fibonacci_#in~n|) .cse10))) (and (or (not .cse0) .cse1 .cse2 .cse3 .cse4 .cse5) (or (not .cse6) .cse7 (not .cse8)) (let ((.cse9 (= |fibonacci_#t~ret7| 1))) (or .cse7 (and (<= 3 fibonacci_~n) .cse9 .cse10) .cse1 .cse2 (and (<= |fibonacci_#in~n| 2) .cse9 (< 1 fibonacci_~n) .cse10) .cse3 .cse4 .cse5))))) [2020-11-30 03:05:02,717 INFO L274 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-11-30 03:05:02,717 INFO L274 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-11-30 03:05:02,717 INFO L274 CegarLoopResult]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2020-11-30 03:05:02,717 INFO L274 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-11-30 03:05:02,717 INFO L274 CegarLoopResult]: For program point L33(lines 33 37) no Hoare annotation was computed. [2020-11-30 03:05:02,718 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 03:05:02,718 INFO L277 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-11-30 03:05:02,718 INFO L274 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-11-30 03:05:02,718 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 03:05:02,718 INFO L274 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-11-30 03:05:02,718 INFO L277 CegarLoopResult]: At program point L27(lines 27 38) the Hoare annotation is: true [2020-11-30 03:05:02,718 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-30 03:05:02,718 INFO L274 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-11-30 03:05:02,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:05:02 BoogieIcfgContainer [2020-11-30 03:05:02,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:05:02,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:05:02,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:05:02,736 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:05:02,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:02:40" (3/4) ... [2020-11-30 03:05:02,739 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 03:05:02,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2020-11-30 03:05:02,750 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-30 03:05:02,750 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 03:05:02,750 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 03:05:02,751 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 03:05:02,785 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_96ac9d15-9c9c-4d78-94b2-44ccef4303fb/bin/utaipan/witness.graphml [2020-11-30 03:05:02,785 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:05:02,786 INFO L168 Benchmark]: Toolchain (without parser) took 143498.32 ms. Allocated memory was 86.0 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 54.6 MB in the beginning and 1.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 188.2 MB. Max. memory is 16.1 GB. [2020-11-30 03:05:02,787 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 44.5 MB in the beginning and 44.4 MB in the end (delta: 35.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:05:02,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.19 ms. Allocated memory is still 86.0 MB. Free memory was 54.4 MB in the beginning and 62.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 03:05:02,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.75 ms. Allocated memory is still 86.0 MB. Free memory was 62.8 MB in the beginning and 61.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:05:02,797 INFO L168 Benchmark]: Boogie Preprocessor took 43.81 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 60.7 MB in the end (delta: 964.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:05:02,797 INFO L168 Benchmark]: RCFGBuilder took 429.51 ms. Allocated memory is still 86.0 MB. Free memory was 60.7 MB in the beginning and 47.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 03:05:02,798 INFO L168 Benchmark]: TraceAbstraction took 142494.34 ms. Allocated memory was 86.0 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 47.0 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 180.7 MB. Max. memory is 16.1 GB. [2020-11-30 03:05:02,798 INFO L168 Benchmark]: Witness Printer took 49.74 ms. Allocated memory is still 1.8 GB. Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:05:02,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 44.5 MB in the beginning and 44.4 MB in the end (delta: 35.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 424.19 ms. Allocated memory is still 86.0 MB. Free memory was 54.4 MB in the beginning and 62.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.75 ms. Allocated memory is still 86.0 MB. Free memory was 62.8 MB in the beginning and 61.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.81 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 60.7 MB in the end (delta: 964.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 429.51 ms. Allocated memory is still 86.0 MB. Free memory was 60.7 MB in the beginning and 47.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 142494.34 ms. Allocated memory was 86.0 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 47.0 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 180.7 MB. Max. memory is 16.1 GB. * Witness Printer took 49.74 ms. Allocated memory is still 1.8 GB. Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 140.6s, OverallIterations: 10, TraceHistogramMax: 155, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 217 SDtfs, 1460 SDslu, 1088 SDs, 0 SdLazy, 2426 SolverSat, 2442 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8349 GetRequests, 7983 SyntacticMatches, 75 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 191 PreInvPairs, 295 NumberOfFragments, 232 HoareAnnotationTreeSize, 191 FomulaSimplifications, 1042 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 2386 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 123.4s InterpolantComputationTime, 7917 NumberOfCodeBlocks, 6886 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 11839 ConstructedInterpolants, 0 QuantifiedInterpolants, 13641285 SizeOfPredicates, 59 NumberOfNonLiveVariables, 6583 ConjunctsInSsa, 324 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 514886/581679 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...